Terminal Random Access Resource Selection for 5G Delay Reduction
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Solution Overview
Problem
In 5G mobile communications, terminals face challenges in selecting appropriate random access resources during the random access procedure, leading to increased delay and reduced success rates due to the inability to determine suitable resources for sending data in unsynchronized states.
Innovation Solution
A method where a terminal obtains resource allocation information indicating multiple candidate random access resources and selects a target resource based on a preset selection rule, either randomly selecting contiguous resources or choosing the latest available noncontiguous resources, to expedite the random access message transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the terminal uses a 2-step random access procedure with multiple candidate resources, then the resource utilization is improved, but the terminal cannot determine which resources to use leading to increased delay
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple candidate random access resources (including both contiguous and noncontiguous resources) before the random access procedure is triggered. The terminal stores these pre-configured resources and uses predetermined selection rules to quickly determine which resource to use without needing real-time network guidance, thereby reducing access delay while maintaining high resource utilization.
2Ease of operation
If the terminal selects randomly from contiguous resources, then the selection process is simple, but the success rate may be reduced due to suboptimal resource choice
Solution Approach 1:
The patent applies parameter changes by introducing different selection criteria based on resource characteristics. Instead of uniform random selection, the terminal changes the selection parameter based on whether resources are contiguous or noncontiguous: for contiguous resources, random selection is used; for noncontiguous resources, the latest available resource is selected. This parameter adaptation maintains simplicity while improving success rate by optimizing resource choice based on actual resource distribution patterns.
3Use of energy by moving object
If the terminal uses unsynchronized uplink transmission for small packets, then power consumption is reduced, but timing synchronization must be obtained through random access procedure
Solution Approach 1:
The patent applies segmentation by dividing the random access resource selection into independent segments: contiguous resource selection and noncontiguous resource selection, each with its own simple rule. This segmentation simplifies the overall decision-making process, allowing the terminal to quickly determine the appropriate resource without complex calculations, thereby maintaining low power consumption while managing procedure complexity through structured decision logic.
Data Source
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AI summary
This disclosure discloses a random access transmission method and a terminal. The method includes: obtaining resource allocation information for random access, where the resource allocation information indicates at least two candidate random access resources, and the candidate random access resources include candidate resources for sending data; selecting a target random access resource from the at least two candidate random access resources according to a preset selection rule; and sending a random access request message over the target random access resource.